System of electrical transmission.



FIPBlOb 'l lh Nevron rif/'Chard 5. .50g/cw.

Patented Apr. e, 1915.

l ii l wl gdj H. A. ILMJ'LIJ..

SYSTEM 0F ELECTRICAL TEANSMISSUN.

APPLICATION msn wuts 19H IMJ 0R EN lag/1A nyA. ENGLER. SYSTEM 0FELECTRICAL TRANSMISSION.

AFFLICATION F1LD JULY-13.1914A Patented Apr. 6, 1915.

2 SHEETS-SHEET ,NYE/WOR @Chard/ Eng/er. BY l -:f

TTU/THEY "-WWP- wlmsssss.-

faz, a. M4

RICHARD A.,A.. ENGLEB, 0F D'UBUQUE, IWA.

SYSTEM OF EIhECTRIClAL TRANSMISSION.

- specification or Leners Patent. 4

Patented Apr. 6, 1915.

Application ned my 1s, 1914.. sriamassdsz?.

' T0 all 1li/wm it may concern'.-

Be it known that I, RICHARD A. ENGLER, citizen ot' the United States.lresiding at Dubuque, in the county of Dubuque and State of Iowa, haveinvented a certain new and useful Improvement in Systems of ElectricalTransmission, of which the following is a fulL'clear, concise, and exactde scription, reference being had to the accompanying drawings,- forminga part of this specification.

My invention relates to systems of electrical transmission and employs asound producing electric lamp in an operating circuit, means forimpressing wave form current upon said circuit to cause varying soundwaves and light rays to emanate from the lamp, circuit controllingresponsive devices respectively subject to the action .of the soundwaves and light rays, a receiving responsive device, and a circuit forthe receiving responsive device which is jointly controlled by saidcircuit controlling responsive devices.

In the preferred embodiment of the invention the means for im ressingwave form current is inthe form oa telephone transmit-ter whilethe'circuit controlling responsive devices desirably reside in a secondtelephone transmitter which e operated by the sound waves emanating fromthe electric lamp and a resistance controlling device which is subjectto the influence of the light rays emanating from said lamp to changethe resistance according to the light rays due to the telephonie currentimpressed upon the lamp.

I will explain my invention more fully by reference to the accompanyingdrawings showing preferred embodiments and certain uses thereof but towhich embodiments and uses the invent-ion is not-to b e limited, Figure1 being a diagram showing a system of circuits and apparatus thatconstitute one form oi' the invention; and Figs. 2, 3 and diagmuis ofmodiications of the embodiment of j-the invention illustrated in Fig.1.i

Like parts are indicated by similar characters of reference throughoutthe. different figures.

Referring first more particularly to Fig. '1, there is there illustrateda primary or inducing main telephone circuit that includes a talkingbattery or other source of suitable current 1,\ an impedance coil 2, a

lamp 3 supplied with current from the battery 1 and shown in the form ofan arcophone or aspeaking arc having carbons 4, a primary winding 5.0ian induction coil,

and some means for regulating the intensity 50 of the .light produced bythe lamp for a given flow of current, this means being pref- I erably inthe form of a rheostat f5. The means for effecting fluctuationof thecur? rent in the main circuit is in the 'form of a 65 .telephonetransmitter 7 of usual construction, though the invention is not .to belimited to the employmentof a telephone transmitter. When thistransmitter is spoken into current variations occur in the 7o maincircuit because the impedance coil A2. prevents the flow of rapidfluctuations of current through it, there being a correspondingvariation of the flow of current through the carbons 4 of the lamp 3.The light at 75 the arc or other light producing center of the lampvaries in response to the variation of current in the main circuit, thelamp producing correspondingly varying sound waves and .light rays. IThecondenser 8 is located 80 in bridge of the main circuit, the battery land rheostat 6 being upon one side of this bridge wliile the rest of theapparatus which has been so far specifically described is upon the otherside of the bridge. denser serves to increase the value of the etl'ectproduced in the arc. The condensing lens 9 1s traversed by varying lightrays produced by the lamp while the metallic dia? phragm 10 is subjectto the varying sound 90 waves producedby the lamp. For the sakeofconvenience the elements 9 and 10 form 'component parts of the wallsof a housing 11 which is desirablyv employed for inclosing the lamp. Thelens 9 is employed in order 95 'that it may concentrate. the light raysemanating from a portion of the lamp and direct the same upon a seleniumcell 12-or other sensitive medium whose resistance is varied through awide range upon small 100 variations in the intensity of the lightwhereby the light may effectively serre to vary the resistance of acircuit throughout a comparatively wide range, to which end the elementl2 may-be directly included in 105 the circuit. whose resistance is thusto be modified in accordance with the variation Off light emanating fromthat portion of thelamp 3 which 1s individual to the lens ,9.

The circuit illustrated in Fig-1 includes, 1n 11 This cony, I Latn-1,1?

, 2 insignes ...dition to the selenium cell 12, a primary 1 3 of :ininduction coil and a battery 14, or other suitable source of current,for supplying the selenium cell and the circuit inc ud- 5 ing the samewith current. A condenser 15 is desirably included in direct shuntof'the battery 14 to increase the value of the effects ultimatelyproduced in the primary 13 by the operation of the varying light uponthe cell 12. Q

The sound waves emanating from a portion of the lamp that is individualto the diaphragm 10 impinge upon said diaphragm to vary the intimacy ofits constant 15 engagement with a contact 16, thereby to vary theresistance of a circuit in which this diaphragm and contact are.,.tluded This .circuit contains, in addition to the diaphragm 10 andcontact 16, the primary 17 of an induction coil and a battery 18, or

other suitable source of current, for pplying the circuit with current.-Ai ndenser 19 is desirably included in di ct shunt of the battery 18 toincrease the value of the effects ultimately produced in the primary 17by the operation of the varyingsound waves upon the diaphragm 10. TheVprimaries 5, 13 and 17 are respectively provided with secondaries 20, 21and 22. n

Fig. l, these secondaries are'shown as ing serially included in asecondary lcircuit that is common to the circuits including the variousprimary windings. This secondary circuit is shown as also including awinding 23 which is disposed aboutthe permanently magnetized core 24,the elements 23 and 24 being preferably similar to the windin and coreofa telephone receiver. Telep onic current impressed uponthe maintelephone circuit that includes the lamp 3, the varying light and soundwaves emanating from the lamp, the current in the circuits including theprimary windings 5, 13 and 17, and the current traversing the coils 20,21, 22 and 23, should be maintained in phase to which end a condenser 25is serially included in the circuit that contains the coils`20, 21, 22and 23 to neutralize the lag that would otherwise be due to theself-induction in the magnet winding 23, and closed circuits containingcoils 26 and 27 are placed in secondary relation to the primaries .13and-17 respectively, these closed or auxiliary second ary circuitsserving to offset the sli ht lag that would otherwise be present in t eprimaries 13 and 17. The slight lag in these primaries would btherwisebe due to the fact that the counter M. M. F. produced in the secondaries21 and 22 would be slightly less than the M. M. F. of said primariessince the winding 23 has effective resistance, the auxiliary secondaries26 and 27 rectifyin'g this condition. By the entire arrangementdescribed all of the current uct-ua-l tions in the various primarycircuits are incoming impedance.

phase with the light raysxd sound waves of the speaking lamp a'nd alsowith the variations in the operated transmitter 7'.

The 'circuit arrangement illustrated in Fig. 1 is preferred since,eachreproducing element has the shortestim'ible circuit and least resistanceaccompanied by corresponding greatest percentage of variation 0j thecurrent flow, though I do not wish to be" limited to the inclusion ofthe main secondary coilsin the same circuit nor do I wish to be limitedto the inclusion of the auxiliary secondary coils in seperate circuits.The receiver that includes the elements 23 .and 24 may itself beprovided with a diaphragm 28, such as is found in a telephone receiver,and this diaphra may be in constant though varying enga ement with atained in the circuit which also inc udes iiny suitable agency that isto be cont olled by the receiver.

contact 29. The elements 28 and 'l are con- This circuit may include animpedance coil 2'A having a -circuit arrange-,-

ment similar to that of the impedance coil 2, in whichl event thereceiver correspon to the receiver 24 and controlled by the elements 28and 29 may have a diaphragm free of a contact to enable the a licationof such nal receiver to the ear. y including the receiver winding 23 inasecondary circuit and causing it to iniluenee the operation of anextraneous device such as the dia.

phragm 28, such secondary circuit can have the smallest possible andconmint resistance most eectively to overcome the impedance in thecircuits containing the primary windin Iii the arrangement illustratedin Fig. 2 the elements v 10, 16, 12 and 13 are included in serialrelation in a circuit path -`that is in shunt -of .the impedance coil 2and consequently in parallel with the circuit path that includesthetransmitter- 7 whereby current emanating from the battery 1 issupplied to the clefmentsl 10, 1,2ali11d 16 withouthe necessity'oemp.oyin` g t e auxili atter 14. In Fig. 2 the primary windinzgxiBServei the purpose of an impedance coil when the surges of the currentare the wrong way. For4 1nstance, if the transmitter spoken intoincreasesA the current iiow then current flow would tend to decrease inthe branch talking circuit, a result which is prevented by the impedancefurnished by said primary 13. Also, the two secondary currents inducedat 2O and 2l would tend to neutralize each other were it not for theimpedance furnishedby the primary 13. But when the current in- .creasesin the main talking circuit and the reaction of the arc of the lam alsocauses an increase of current in these circuits, then the secondariesfunction properly together, that is current dow is aiiowed in them, thusover- In the system of Fig. 2 current variations vtend to be set up inboth ist tbf u'iin and secondary talking circuits by the action 'of thetransmitter 7 but it is retarded or choked in the secondary talkingcircuit, being a surge in the 'wrong direction, but the variation of tbemain circuit starts the arc to act to set up a surge in the properdirection in the secondary talking circuits.

Fig. 3 illustrates the primary transmitter 7 and the transmittingelements 1'2. 10 and 16 in serial relation in the same telephonie whichis jointlj,J controlled by said circuit controlling responsive devices.'

3. A system of electrical transmission including a sound producingelectric lamp and its operating circuit; a telephone transmitter forlmpressmg telephonie current upon said circuit to cause 'varying vsoundwaves and light rays to emanate from the lamp; circuit controllingresponsive devices respectively subject to the action of the sound wavesand circuit, the circuit path that includes these ;liglit rays; areceiving responsive device;

-elements being in shunt of the impedance.

device 52. In the form ot' the invention illustrated by Fig. 3 theprimary coils 1? and 17 are replaced by a, primary coil 13 in inductiverelation to a secondary coil 211 that replaces the secondary coils Q1and 22.

In the arrangement illustrated in Fig. 4, the primary talking current isimpressed upon the speaking lamp by means of'an induction coil having aprimary 29 included in a closed local circuit with the transmitter 7 andthe transmitter battery 30 and a secondary coil 31 included in serieswith the speaking lamp. In this arrangement the battery 1 is separatedfrom the transmitter T and in order that the battery 1 may be maintainedin proper association with the speaking lamp the secondary 31 isincluded in circuit with the lamp through condensers 32. By thisarrangement great microphone variations may be secu-red with the aid ofa circuit ct' small resistance.

While l have herein shoivn and particularly described the preferredembodiment oi. my invention I do not Wish to be limited to 4the precisedetails of construction and circuit arrangemcnt shown. as changes mayreadily be made without departing from the spirit of my'invention, but

Having thus described my invention I claim as neu' and desire to securebyLetters Patent the olloivingz- 1. A system of electrical transmissionin- A cluding a sound producing electric lamp and its operatingcircuitrmeans for impressing wave form current upon said circuit tocanse varying sound waves and light rays to emanate from'tlihmp; circuitcontrolling responsive devices respectively subject to the action of thesound waves and light rays; a receiving responsive device; and a circuitfor the receiving responsive device which is' jointly controlled by saidcircuit controlling responsive devices.

2. Asystem of electrical transmission including a sound producingelectric arc lamp and its operating circuit; means for impressing waveform current upon said circuit to cause varying sound waves and lightrays to emanate fromtlie arc lamp; circuit controlling responsivedevices respectively subject @to the-action of tbe sound waves and lightrays; a receiving responsive device; and a c;.cu1t for the receivingresponsive device and a circuit for the receivin responsive l devicewhich is jointly controlle by said cir- -ing responsive device-which isjointly controlled by said circuit controlling responsive devices.

A system of electrical transmission including a sound producing electriclamp and Aits operating circuit; means for impressing wave form currentupon said circuit'. to cause varying sound waves and light rays toemanate from thelamp; circuit controlling responsive deviresrespectively in the form of a transmitter operated by sound wavesemanating from the lamp; a circuit resistance varying element operableby the varying rays of the lamp to effect changing resistance;l acircuit controlled by said circuit controlling responsive devices; and areceiving responsive device controlled'bysaid circuit. I

6. A system of electrical transmission including a sound producingelectric arc lamp and its operating circuit; means lfor impressing waveform current upon-said circuit to cause varying sound waves and lightrays to emanate from the arc lamp; circuit controlling responsivedevices respectively in the form of a transmitter operated by soundwaves emanating from the arc lamp; a circuit rcsistancc varying elementoperable by the'varyinfi rays of tbe lamp to effectchantring'resistance: a circnitlcontrolled by said circuit controllingresponsive devices; and

a receiving` responsive device controlled by said circuit.

7. A system of electrical transmission includinsy a sound producingelectric lamp and its operating circuit; a telephone transmitter forimpressing telephonie current upon said circuit to cause varying soundwaves and light rays to emanate from the lamp; circuit controllingresonsive devices respectively in the form o a transmitter operated fromthe arc lamp;

by sound waves emanating from the lamp; a circuit resistance varyingelement operable by the varying raysmf the lamp to effect changingresistance; a circuit controlled by saidcircuit controlling responsivedevices; and a receiving responsive device controlled by said circuit.

8. A system of electrical transmission in cluding a sound producingelectric arc lamp and its operating circuit; a telephnneiransmitter for'impressing telephonie current upon said circuit to cause varying soundwaves and light rays toemanate from the arc lamp; circuit controllingresponsive devices respectively in the formof a transmitter operated bysound waves unan-ating snc controlled by said responsivedevices;

and a receiving responsive .de' vice controlled by said circuit.

a. circuit resistance varying element operable by the varying rays of.the .lamp to effect induction windings interposed between the circuitcontrolling responsive devices and the circuit for the receivingresponsive device.

12. A system of electrical transmission including a sound producingelectric arc lamp and its operating circuit; a telephone transmitter for impressing telephonie current uponsaid circuit to cause varying soundwaves and light rays to emanate from the arc lamp; circuit controllingresponsive devices respectively subject to the action of the sound Wavesand light rays; a receiving responsive device; a circuit for thereceiving responsive-device which is jointly controlled by said circuit.controlling responsive dejvices; and induction windings interposedbetween the circuit controlling responsive lsponsive device.

13. A system of electrical transmission in- `cluding a sound producingelectric lamp and j :its .operating circuit; means for impressing`isvave form current upon said circuit to cause 9. A system ofelectrical transmission `in-aavarying sound waves and light rays toemacluding a sound producing electric lamp and lts operating circuit;means for impressing wave form current upon said circuit to causevarying sound Waves and light rays to emanate from the lamp; circuitcontrolling responsive devices respectively subject to theI action ofthe sound waves and light rays; a receiving responsive device; a circuitfor the receiving responsive device which is jointly controlled by saidcircuit controlling responsive device; and induction windings interposedbetweenthe circuit controlling responsive devices and the circuit forthe receiving responsive device.

10. A syst-em of electrical transmissionincludiug a sound producingelectric arc lamp and its operating circuit; means for impressing waveform current upon said circuit to cause varying sound waves and lightrays to emanate from the arc lamp; circuit controlling responsivedevices respectively subject to the action of the sound waves and lightrays; a receiving responsive device; a

circuit for the receiving .responsive device which is jointly controlledby said` circuit controlling responsive devices; and induction windingsinterposed between the circuit controlling responsive devices and thecircuit for the receiving responsive device.

11. A system nf electrical transmission including a sound producingelectric lamp and its-operating circuit; a telephone transmitter forimpressing telephonie current upon said circuit to cause varying soundwaves and light rays to emanate from the lamp; circuit controllingresponsive devices respectively subject to the action of the sound wavesand light rays; a receiving responsive device; a circuit for thereceivin responsive device which 1s jointly control ed by said circuitcontrolling responsive device and nate from the lamp; circuitcontrolling responsive devices respectively in the form of atransmitteroperated by sound wa ves emanating from the lamp: a circuit resistancevarying elementoperable by the varying rays of the lamp to effectchanging resistance; a circuit controlled by said circuit controllingresponsive devices; a receiving responsive device controlled by saidcircuit; and induction windings interposed between. the circuitcontrolling responsive devices and the circuit.for the receivingresponsive device.

14. A system of electrical transmission including a sound producingelectric arc lamp and .its operating circuit; means for impressing waveform current upon said circuit to cause varying sound waves and light'rays to emanate from the arc lamp; circuit controlling responsivedevices respectively in the form ofv a transmitter operated-by soundwaves emanating from the arc lamp; a circuit resistance varying elementoperable by the varying rays of the lamp to effect changing resistance;a circuit controlled by said circuit controlling responsive devices; a.recelvmg responsive device controlled by said devices and the circuitfor the receiving re Copies of this patent may be obtained for ilvarying rays of the lamp to eiect changing resistance; a circuitcontrolled by said c ir cuit controlling responsive devices; a receivingresponsive device controlled by said circuit; and induction windingsinterposed between the circuit controlling responsive de- 1Vlees and thecircuit for the receiving'responsive device.

16. A system of electrical transmission including a sound producingelectric arc lamp-f and its operating circuit; a telephone transmitterfor impressing' telephonie' current upon seid circuit to cause varyingsound waves and light rays to emanate from the arc lamp; circuitcontrolling responsive devices respectively in the form or' a transmitvecents each, by addressing the Conum'ssioner o! Patents, Washington, D.C.

w g Itis hereby certified that in Letters Patent No. 1,134,983, grantedApril 6, 1915, i upon the application of Richard A. Engler, of Dubuque,Iowa, for an-improvement T5? in Systems of Electrical Transmission, anerror appears in the printed specifica Y tion requiring correction asfollows: Page 4, lines 2142-2, strike out the Words and semicolon and areceiving` responsive devices; and that the said Letters Patent shouldbe read with this correction therein that the same may conform to therecord of the case in the Patent OHicc.

. signed and sealed this 20th day of July, A. D., 1915.

[SEAL] R. F. WHITEHEAD, 8 'Acting Uommz'ssz'oner of Patents.

